# coding:utf-8
from __future__ import division
def suan(x,o,y):
	suan = {
	"+": x+y,
	"-": x-y,
	"*": x*y,
	"/": x/y
	}
	return suan.get(o)

x = int(input("输入第一个数："))
o = input("输入运算符：")
y = int(input("输入第二个数："))

res = suan(x,o,y)
print ( x,o,y,"=",res)
input("按任意键结束...")